从介词本身的意义来看：

　　1. 表示时间的介词

　　about, around, before, by, at, after, in, on, around, between, during, for,

　　from, since, till, until, within

　　2. 表示地点的介词

　　about, at, in, on, over, through, across, along, around, before, between,

　　beyond, down, up, to, toward, under, near

　　3. 表示方式的介词

　　by bus 乘公共汽车

　　see with ones own eyes 亲眼看...

　　write in ink 用墨水写...

　　on foot 步行，徒步

　　He looked at me without expression. 他毫无表情地看着我。